const enum exports are unusable for downstream packages

[jflatow]

When trying to use e.g. SpecId, the enums exported are unusable in downstream packages that use Deno (or isolateModules generally):

TS2748 [ERROR]: Cannot access ambient const enums when 'isolatedModules' is enabled.

when you try to reference a value of the enum.

The main enums in question are generated in this file: https://github.com/NomicFoundation/edr/blob/main/crates/edr_napi/index.d.ts

[fvictorio]

@jflatow can you give us minimal reproduction steps?

[jflatow]

@jflatow can you give us minimal reproduction steps?

Sure - put the following in a file, say example.ts:

import { SpecId } from "npm:@nomicfoundation/edr";

Deno.test("does not compile", async () => {
    console.log("latest", SpecId.Latest);
});

Run:

$ deno test example.ts
Check file:///example.ts
TS2748 [ERROR]: Cannot access ambient const enums when 'isolatedModules' is enabled.
    console.log("latest", SpecId.Latest);
                          ~~~~~~
    at file:///example.ts:4:27

error: Type checking failed.